A comparative study for the pair-creation contact process using series expansions

Details A comparative study for the pair-creation contact process using series expansions A comparative study for the pair-creation contact process using series expansions

2007-05-03

arxiv.org/abs/0705.0485v1

J. Phys. A, 40, 4305 (2007)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1088/1751-8113/40/16/004

A comparative study between two distinct perturbative series expansions for the pair-creation contact process is presented. In contrast to the ordinary contact process, whose supercritical series expansions provide accurate estimates for its critical behavior, the supercritical approach does not work properly when applied to the pair-creation process. To circumvent this problem a procedure is introduced in which one-site creation is added to the pair-creation. An alternative method is the generation of subcritical series expansions which works even for the case of the pure pair-creation process. Differently from the supercritical case, the subcritical series yields estimates that are compatible with numerical simulations.

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